1 /* net/atm/addr.c - Local ATM address registry */
3 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
7 #include <linux/atmdev.h>
8 #include <linux/sched.h>
9 #include <asm/uaccess.h>
11 #include "signaling.h"
15 static int check_addr(struct sockaddr_atmsvc *addr)
19 if (addr->sas_family != AF_ATMSVC) return -EAFNOSUPPORT;
20 if (!*addr->sas_addr.pub)
21 return *addr->sas_addr.prv ? 0 : -EINVAL;
22 for (i = 1; i < ATM_E164_LEN+1; i++) /* make sure it's \0-terminated */
23 if (!addr->sas_addr.pub[i]) return 0;
28 static int identical(struct sockaddr_atmsvc *a,struct sockaddr_atmsvc *b)
31 if (memcmp(a->sas_addr.prv,b->sas_addr.prv,ATM_ESA_LEN))
33 if (!*a->sas_addr.pub) return !*b->sas_addr.pub;
34 if (!*b->sas_addr.pub) return 0;
35 return !strcmp(a->sas_addr.pub,b->sas_addr.pub);
39 static void notify_sigd(struct atm_dev *dev)
41 struct sockaddr_atmpvc pvc;
43 pvc.sap_addr.itf = dev->number;
44 sigd_enq(NULL,as_itf_notify,NULL,&pvc,NULL);
48 void atm_reset_addr(struct atm_dev *dev)
51 struct atm_dev_addr *this;
53 spin_lock_irqsave(&dev->lock, flags);
56 dev->local = this->next;
59 spin_unlock_irqrestore(&dev->lock, flags);
64 int atm_add_addr(struct atm_dev *dev,struct sockaddr_atmsvc *addr)
67 struct atm_dev_addr **walk;
70 error = check_addr(addr);
73 spin_lock_irqsave(&dev->lock, flags);
74 for (walk = &dev->local; *walk; walk = &(*walk)->next)
75 if (identical(&(*walk)->addr,addr)) {
76 spin_unlock_irqrestore(&dev->lock, flags);
79 *walk = kmalloc(sizeof(struct atm_dev_addr), GFP_ATOMIC);
81 spin_unlock_irqrestore(&dev->lock, flags);
84 (*walk)->addr = *addr;
86 spin_unlock_irqrestore(&dev->lock, flags);
92 int atm_del_addr(struct atm_dev *dev,struct sockaddr_atmsvc *addr)
95 struct atm_dev_addr **walk,*this;
98 error = check_addr(addr);
101 spin_lock_irqsave(&dev->lock, flags);
102 for (walk = &dev->local; *walk; walk = &(*walk)->next)
103 if (identical(&(*walk)->addr,addr)) break;
105 spin_unlock_irqrestore(&dev->lock, flags);
111 spin_unlock_irqrestore(&dev->lock, flags);
117 int atm_get_addr(struct atm_dev *dev,struct sockaddr_atmsvc *u_buf,int size)
120 struct atm_dev_addr *walk;
121 int total = 0, error;
122 struct sockaddr_atmsvc *tmp_buf, *tmp_bufp;
125 spin_lock_irqsave(&dev->lock, flags);
126 for (walk = dev->local; walk; walk = walk->next)
127 total += sizeof(struct sockaddr_atmsvc);
128 tmp_buf = tmp_bufp = kmalloc(total, GFP_ATOMIC);
130 spin_unlock_irqrestore(&dev->lock, flags);
133 for (walk = dev->local; walk; walk = walk->next)
134 memcpy(tmp_bufp++, &walk->addr, sizeof(struct sockaddr_atmsvc));
135 spin_unlock_irqrestore(&dev->lock, flags);
136 error = total > size ? -E2BIG : total;
137 if (copy_to_user(u_buf, tmp_buf, total < size ? total : size))